> Why would they?

Then why provide Bootcamp at all?

> Do you blame PC makers who have bad battery life on Linux because there are bad open source drivers?

In a word, yes. I do.

But the reality on the ground is that a lot of those hardware manufacturers aren't advertising Linux support as a "feature." Apple does advertise Windows support as one.

Ever since the switch to Intel chips, Apple has billed all of their Macs as being able to run Windows and that is a big selling point for them. So, I don't think it's out of line to ask them to make proper drivers for running an operating system that they do support.